Experiment name: not available Principal Investigator: not available PI's affiliation: WHOI Mooring Name: WHOI 628 Mooring position: 27.427 deg N, 47.833 deg W Instrument depth: 3994 meters Seafloor depth: 4062 meters Times: starts 18 Jun 1977, ends 22 May 1978 Time increment: 60 minutes Instrument type: not available parameter min mean max sd days speed (cm/sec) 1.80 3.03 11.74 1.79 338.3 dir (deg true) 0.91 151.22 359.68 46.44 338.3 u (cm/sec) -6.23 1.20 8.75 1.65 338.3 v (cm/sec) -11.43 -2.08 4.83 1.95 338.3 temp (deg C) 2.27 2.32 2.36 0.01 338.3 Approximately 55% of the speeds measured by this instrument were at or below the current meter's threshhold, which is 1.8 cm/sec. In this file these (unknown) speeds have been set to 1.8 cm/sec. Most of the below-threshhold speeds occur during a single, long episode that begins on 15 Aug 77 and ends on 14 Jan 78. This amounts to about 45% of the entire current record. We do not know whether this represents an instrument failure or an unusually long period of quiescence on the part of the ocean. Directions during this episode are similar to those measured before and afterward. Often, when current speed is close to zero we see random and highly variable directions. The fact that the directions during this interval are not unusually variable is evidence that the speed sensor may have failed. This file is from a group of records whose speeds are noisier than usual. These records (hourly measurements from WHOI moorings 623 through 632) are from the same general area and the same time span, and appear to be from a single experiment. The noisy speeds may be due to a persistant instrument malfunction. While this is not necessarily the case, we suggest that you keep this possibility in mind if you use the data.
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